Related Clues:

• Feature of many letters
• Principal
• Leading
• Genteel affair
• Iced ___
• After-dinner offering
• Tree decoration
• See 56-Down
• Kind of therapy
• Old-fashioned cold remedy
• Symbol on a Cowboy's helmet
• Oolong, for one
• See 15-Across
• Steeper?
• Part of a letter